The most important of these is America: History and Life. But there may be a few things in Historical Abstracts as well.
Depending on your topic, you may wish to try a law database, too, including the additional law databases at the University of Washington below.
Unlike the ATLA Religion Database & ATLA Serials and the Religion and Philosophy Collection, Index Theologicus is not linked to SPU full text.
University of Washington databases you must be on the University of Washington campus to use. Use a public computer or ask a librarian at the Reference Desk how to procure a wireless account. Consider the following above all: